Article
Materials Science, Multidisciplinary
N. Nedyalkov, A. Dikovska, L. Aleksandrov, M. Terakawa
Summary: In this study, the ablation rate and surface modifications of aluminum nitride ceramic treated by pulsed nanosecond Nd:YAG laser at different wavelengths were investigated. It was observed that the ablation efficiency decreased with increasing laser fluence and number of pulses for all wavelengths. Laser treatment resulted in the formation of various micro and nanostructures on the surface, along with the creation of a conductive layer.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Xinyu Hu, Ze Tian, Xiao Luo, Changhao Chen, Guochen Jiang, Lizhong Wang, Rui Peng, Hongjun Zhang, Minlin Zhong
Summary: This study systematically investigated the wetting behavior of gallium-based liquid metal (EGaIn) on various micro-structured metal surfaces and identified factors affecting its wetting properties, such as surface roughness, oxygen content, and relative humidity. The study also successfully obtained metal surfaces with superlyophobicity and anti-corrosion properties through optimized surface treatment methods. These findings contribute to the improvement of liquid metal applications in various fields.
SURFACES AND INTERFACES
(2022)
Article
Optics
Robert Baumann, Stephan Milles, Beate Leupolt, Susann Kleber, Johannes Dahms, Andres Fabian Lasagni
Summary: This study presents an innovative method for tailoring the wettability of copper surfaces using DLIP technology, forming a pattern with a spatial period of 3.3 μm and texture depths up to 1.01 μm through laser interference. The wettability can be adjusted to static water contact angles between 120 and 150 degrees by utilizing a low-cost nanosecond laser source and innovative beam shaping setup.
OPTICS AND LASERS IN ENGINEERING
(2021)
Review
Chemistry, Multidisciplinary
Ri Liu, Liang Cao, Dongdong Liu, Lu Wang, Sadaf Saeed, Zuobin Wang
Summary: A microstructure plays a crucial role in determining the functionality of a macro surface. Laser interference lithography (LIL) is a technique that can fabricate high-resolution periodic structures over large areas without the need for masks. It offers flexibility and rapidity in production. Different interference conditions can generate a wide range of light fields, enabling the production of various periodic textured structures. This paper reviews the principles of LIL, discusses its parameters' effects on the interference light field, and presents its applications in functional surface fabrication.
Article
Materials Science, Multidisciplinary
N. Nedyalkov, A. Dikovska, K. Grochowska, R. Jendrzejewski, L. Aleksandrov, T. Dilova, G. Atanasova
Summary: The work examines the process of ablating silicon nitride ceramics using nanosecond laser pulses. The study investigates the effects of laser fluence and number of pulses on the ablation depth at different wavelengths. It is found that the ablation depth saturates with increasing laser fluence. Additionally, the study analyzes the micro- and nanostructures formed on the surface of the material and the chemical changes that occur during the laser treatment.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Optics
Lei Chen, Zelin Liu, Chuan Guo, Tongcheng Yu, Minsun Chen, Zhongjie Xu, Hao Liu, Guomin Zhao, Kai Han
Summary: This paper proposes an effective method to generate specific periodical surface structures using a 532 nm laser. The experiments show that laser-induced periodic surface structures (LIPSSs) can be obtained with a fluence of 121 mJ/cm(2) and 1000 pulses. The fluence threshold for LIPSS generation gradually increases with a decrease in the number of pulses. Additionally, the incident angle of the laser has a significant effect on the period of LIPSS, while the reflectivity of silicon is significantly reduced with the presence of LIPSS.
CHINESE OPTICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Nicolas Dalloz, Van Doan Le, Mathieu Hebert, Balint Eles, Manuel A. Flores Figueroa, Christophe Hubert, Hongfeng Ma, Nipun Sharma, Francis Vocanson, Stephane Ayala, Nathalie Destouches
Summary: Passive plasmonic metasurfaces enable image multiplexing by displaying different images under various observation modes, including naked-eye observation and polarized light. The laser-processed random plasmonic metasurfaces enhance spatial resolution and image quality for commercial use through self-organized patterns.
ADVANCED MATERIALS
(2022)
Article
Optics
A. P. Porfirev, S. N. Khonina, N. A. Ivliev, D. P. Porfirev
Summary: We propose a method for laser processing of chalcogenide glasses (CGs) using laser fields with a spatially varying polarization distribution generated by a liquid crystal polymer (LCP) depolarizer. The depolarizer transforms a linearly polarized Gaussian laser beam into a laser beam with the same intensity distribution and a space variant polarization distribution. The polarization sensitivity of CGs allows for the formation of surface relief gratings (SRGs) through the movement of material according to the local polarization distribution.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yanling Wan, Candong Yan, Huadong Yu, Bo Wang
Summary: A square-ring structure array is created on an aluminum alloy surface using nanosecond laser processing, resulting in a durable and anti-icing superhydrophobic surface. The surfaces exhibit high contact angles and low sliding angles at both 15 degrees C and -15 degrees C, enabling water droplets to slide off before freezing. The surfaces also demonstrate good anti-icing performance, with extended icing delay times and reduced icing quantities at -15 degrees C, indicating stable wettability and performance.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Theresa Jaehnig, Cornelius Demuth, Andres Fabian Lasagni
Summary: The study focuses on the effects of varying sulphur content on steel surfaces structured with direct laser interference patterning (DLIP), showing that lower sulphur content results in single peak geometries while higher sulphur content leads to split peak structures. The peak formation is explained using concepts of thermocapillary convection in weld pools, and numerical simulations are utilized to investigate the influence of sulphur content in steel on melt pool convection during nanosecond single-pulsed DLIP.
Article
Optics
Xue Yang, Chengjuan Yang, Zhen Yang, Dawei Zhang
Summary: This paper proposes a novel method of laser composite processing to strengthen the corrosion resistance of Nitinol Shape Memory Alloy (NiTi SMA) by combining it with an efficient silanization treatment process. The method involves femtosecond and nanosecond lasers sequences texturing the surface of the NiTi SMA, resulting in multilayered micro/nanostructures, and further increasing the surface roughness. Superhydrophobic surfaces are prepared on NiTi SMA substrates through separate laser and laser composite processing with silanization treatment. The results show improved corrosion resistance and superhydrophobicity.
OPTICS AND LASER TECHNOLOGY
(2023)
Editorial Material
Nanoscience & Nanotechnology
Peter Gregorcic
Summary: Experimental results show that controlled contamination is crucial for consistent surface wettability alterations after low-temperature annealing. Analysis reveals that contamination with hydrophobic PDMS may arise from the furnace, resulting in water repellency on the surface. Annealing in a contaminant-free furnace preserves initial superhydrophilicity, while annealing in a contaminated furnace leads to different wettability transitions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Condensed Matter
Yuyi Feng, Tobias Kemmer, Philipp Graus, Clayton A. Nemitz, Paul Leiderer, Yongtian Wang, Lukas Schmidt-Mende, Johannes Boneberg
Summary: The study on the interaction mechanism between plasmonic metamaterials and lasers shows that nanosecond laser pulses significantly improve the crystallinity of silver nanorod arrays and evaporate some of the silver into the air. These findings pave the way for future high-performance plasmonic meta-devices.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Qinghua Wang, Huixin Wang, Zhixian Zhu, Nan Xiang, Zhandong Wang, Guifang Sun
Summary: The study presents a laser-based surface texturing method for switchable wettability control on titanium surface, enabling efficient transition between superhydrophilicity and superhydrophobicity. The reversible wettability transition is attributed to the dual-scale surface structure and controllable surface chemistry. The method allows practical throughput for large-area processing and various industrial applications.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Manufacturing
Vishnu Narayanan, Ramesh Singh, Deepak Marla
Summary: A computational model based on the finite volume method is presented in this work for predicting surface roughness during laser surface processing. The model captures various physical phenomena such as laser absorption, heating, melting, vaporisation, plasma effects, melt pool flow and solidification, as well as the effect of laser scanning. The surface roughness values obtained using the model are reasonably within the limits of the experimental data.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Microscopy
Saba Tabean, Michael Mousley, Christoph Pauly, Olivier De Castro, Eduardo Serralta, Nico Klingner, Frank Muecklich, Gregor Hlawacek, Tom Wirtz, Santhana Eswara
Summary: The newly developed microscope prototype npSCOPE was utilized to conduct Scanning Transmission Ion Microscopy (STIM) using keV He+ ions, revealing rich microstructural features including isolated nanoscale twin bands in a 50 nm thick gold membrane. The experimental conditions showed a lateral resolution close to 30 nm in STIM imaging. Monte Carlo simulations were performed to derive insights related to beam broadening and its effect on transmission image resolution, while observations indicated the sensitivity of channelling contrast to even small changes in illumination conditions.
Article
Materials Science, Multidisciplinary
Tobias Fox, Frank Muecklich
Summary: This article discusses various parameters used in laser material processing and highlights the challenges in accessing the pulse-to-pulse overlap. It introduces a novel calculation route that accurately determines the overlap and the average number of laser pulses interacting with a given point on the surface. This approach enables more reliable and comparable laser processes, improving control precision.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
U. Pranav Nayak, Frank Muecklich, Maria Agustina Guitar
Summary: By using destabilization heat treatments, the microstructure and tribological responses of abrasion-resistant high-chromium white cast irons can be altered. The study found that a suitable destabilization treatment can reduce the wear rate and improve the wear resistance of the samples. The distribution of retained austenite and secondary carbides in the samples was also found to have a significant impact on the wear properties. The results provide insights for tuning the microstructure of high-chromium white cast irons.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Timothy Maclucas, Lukas Daut, Philipp Gruetzmacher, Maria Agustina Guitar, Volker Presser, Carsten Gachot, Sebastian Suarez, Frank Muecklich
Summary: The influence of structural depth on the friction-reducing and wear-resistance properties of multi-walled carbon nanotube and carbon onion coatings is investigated. The results show that the shallower the coated structure, the lower its coefficient of friction.
Article
Chemistry, Physical
Daniel Wyn Mueller, Sarah Losslein, Christoph Pauly, Max Briesenick, Guido Kickelbick, Frank Muecklich
Summary: Surface functionalization through biomimetic patterns at the micro-and nanometer scale has been widely employed in various applications. The surface properties, which depend on the morphology of the applied topographies, need to be carefully adjusted for optimal functionalization efficiency. This study investigates the role of surface modification and its impact on pattern formation in the multi-pulse ultrashort pulsed direct laser interference patterning (USP-DLIP) of Cu using a comprehensive characterization approach. The findings reveal the influence of USP-DLIP processing on both the chemistry and mechanical deformation of the substrate surface, affecting laser/material interaction and pattern morphology. Understanding these interactions allows for precise design of micro-and nanoscale patterns during USP-DLIP processing.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
U. Pranav Nayak, Florian Schaefer, Frank Muecklich, Maria Agustina Guitar
Summary: The sub-surface microstructure of a heat treated and worn 26 wt% Cr white cast iron was investigated to understand its tribological behavior. Samples were destabilized at 980 degrees C for different durations and subjected to wear tests. Results from SEM, EDS, EBSD, and nanoindentation measurements showed that the destabilized samples had improved wear resistance due to significant plastic deformation, high retained austenite content, and presence of dispersed secondary carbides and martensitic matrix.
Article
Materials Science, Multidisciplinary
Vincent Ott, Christian Schaefer, Sebastian Suarez, Karsten Woll, Frank Muecklich, Hans J. Seifert, Sven Ulrich, Christoph Pauly, Michael Stueber
Summary: In this study, the phase formation and microstructure evolution in Ru/Al multilayers were investigated during thermal annealing. The desired phases were obtained by adjusting the microstructure and design of the as-deposited multilayers. It was found that the phase formation sequence was strongly correlated with the modulation length, and the single-phase RuAl thin films could be synthesized in a controlled manner.
Article
Chemistry, Physical
Paul Braun, Philipp Gruetzmacher, Leonie Frohnapfel, Frank Muecklich, Karsten Durst
Summary: In this study, metallic substrates with a nanocrystalline grain size were structured down to the micro-and nanometre range using a room temperature nanoimprinting process. Hard metal dies patterned by Direct Laser Interference Patterning (DLIP) were used to deform the metallic substrates, transferring the pattern onto a nanocrystalline CuZn30 model alloy. The replication process allowed for the formation of separated dimples and LIPSS on the alloy surface.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Q. Liebgott, A. Borroto, Z. Fernandez-Gutierrez, S. Bruyere, F. Muecklich, D. Horwat
Summary: Recently, it has been reported that dual-phase Zr-based thin films synthesized by magnetron co-sputtering exhibit competitive growth between amorphous and crystalline phases. The amorphous phase grows in columnar structures, while the crystalline phase forms separate cone-shaped regions composed of smaller crystallites. In this paper, the authors use X-ray diffraction, scanning electron microscopy, and transmission electron microscopy to investigate this phenomenon in Zr-Cr and Zr-V thin films. The study evaluates the stability and geometrical characteristics of this self-separation phenomenon under different film compositions and deposition rates, as well as compares the nucleation and growth kinetics of Zr-Cr, Zr-V, Zr-Mo, and Zr-W dual-phase thin films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Coatings & Films
Kaveh Dargahi Noubary, Christian Schaefer, Christoph Pauly, Michael Kellner, Vincent Ott, Michael Stueber, Frank Muecklich, Britta Nestler
Summary: This study investigates the self-propagating reaction in binary Al/Ru multilayers with two different bilayer thicknesses (89 and 178 nm) to form a single-phase AlRu intermetallic compound. Experimental measurements of the time-temperature evolution and electron backscatter diffraction are used to determine the microstructure. A phase-field model is developed based on the minimization of grand potentials using thermodynamic data from the Calphad database. The simulation results show good agreement with the experimental results in terms of grain sizes and reveal that the initial bilayer thicknesses affect the final grain sizes.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Materials Science, Multidisciplinary
Bastian Blinn, Jenifer Barrirero, Lucia Paula Campo Schneider, Christoph Pauly, Philipp Lion, Frank Muecklich, Tilmann Beck
Summary: The fatigue life of metals manufactured via laser-based powder bed fusion (L-PBF) is affected by process-induced defects, including size, geometry, and material properties. In this study, the microstructural changes near a crack-initiating defect in an AISI 316L fatigue specimen produced via L-PBF were analyzed using Xe-FIB, SEM, and EBSD techniques. The analyses revealed a fine grain structure arranged according to the melt pool geometry. Plastic deformation and phase transformation were observed near the border between the defect and surrounding material, with localized variations. The microstructural changes cannot be solely explained by crystallographic orientation, but also depend on the distribution of multiaxial stresses and grain morphology.
Article
Materials Science, Multidisciplinary
T. MacLucas, P. Gruetzmacher, S. Husmann, J. Schmauch, S. Keskin, S. Suarez, V. Presser, C. Gachot, F. Muecklich
Summary: Coating laser-patterned stainless-steel surfaces with carbon nanotubes or carbon onions provides effective solid lubrication by preventing lubricant depletion. Ball-on-disc friction tests showed that shallower textures resulted in lower friction coefficients. Friction testing on substrates patterned with different structural depths revealed severe structural degradation of carbon nanoparticles, with CO-derived tribofilms showing even more substantial degradation.
NPJ MATERIALS DEGRADATION
(2023)
Article
Materials Science, Multidisciplinary
Timothy MacLucas, Silas Schuetz, Sebastian Suarez, Frank Mueller, Frank Muecklich
Summary: This study investigates the coating thickness evolution of pristine and oxidized carbon nanotubes (CNT) on stainless steel substrates. Potentiostatic electrophoretic deposition (EPD) with two different additives, triethylamine (TEA) and magnesium nitrate hexahydrate (Mg-Nit), is used as a coating technique. Confocal laser scanning microscopy is used to determine the thickness of the CNT depositions at different voltages. The results show that higher voltages lead to increased deposition rates and Mg-Nit allows for a higher CNT deposition rate and forms thicker layers compared to TEA.
Article
Chemistry, Multidisciplinary
Tobias Fox, Pablo Maria Delfino, Francisco Cortes, Christoph Pauly, Daniel Wyn Mueller, Max Briesenick, Guido Kickelbick, Frank Muecklich
Summary: This work presents a single-step method to create porous photocatalytic surfaces by direct laser interference patterning of a titanium substrate. The composition and morphology of these surfaces can be controlled through the laser process parameters, making them suitable for specific applications such as antimicrobial surfaces, implant materials, or water treatment. Surface characterization was performed using scanning electron microscopy, focused ion beam cross-sectioning, energy dispersive X-ray spectroscopy, and grazing incidence X-ray diffractometry. The photocatalytic activity of these surfaces was assessed by methylene blue degradation under UV-A light.
Article
Materials Science, Composites
Bruno Alderete, Frank Muecklich, Sebastian Suarez
Summary: Carbon nanotube (CNT)-reinforced silver and copper metal matrix composites were produced via powder metallurgy and sintered via hot uniaxial pressing. The deposition of CNT onto the metallic powder was found to be influenced by particle size and morphology. The addition of CNT improved the electrical performance of the metallic matrices, with higher CNT concentrations showing exceptional contact repeatability and lower electrical contact resistance (ECR) values.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Optics
Zhi-Huan Pang, Meng Liu, Ai-Ping Luo, Yi Xu, Wen-Cheng Xu, Songnian Fu, Zhi-Chao Luo
Summary: We propose a novel mode-dependent gain equalizer using a few-mode chirped fiber Bragg grating (FM-CFBG) to effectively mitigate the mode-dependent gain in an all-fiber 2-mode EDFA. The equalizer based on FM-CFBG offers compact size, low insertion loss, and wavelength scalability, making it meaningful for long-haul MDM transmission.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yiwei Qiu, Chenliang Ding, Gangyao Zhan, Mengdi Luo, Jisen Wen, Mengbo Tang, Chun Cao, Wenjie Liu, Liang Xu, Bihu Lv, Dazhao Zhu, Cuifang Kuang, Xu Liu
Summary: This article proposes a novel method to simultaneously reduce the axial and lateral feature sizes of PPI-DLW. By employing a pseudo 3D hollow focus, a suspended nanowire with an isotropic 30-nm feature size was realized, thereby improving the capabilities of PPI-DLW for fabricating arbitrary 3D structures.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Manzhuo Wang, Jianbo Yue, Zhentao Yao, Tingyu Liu, Xiaoqiang Sun, Yuanda Wu, Daming Zhang
Summary: A silica waveguide 1×8 thermo-optic switch consisting of cascaded three-stage Mach-Zehnder interferometers (MZIs) is successfully demonstrated. The switch utilizes a multimode interference (MMI) coupler in the MMI-MZI 1×2 switch unit for its wavelength insensitivity and favorable fabrication tolerance. The switch design and optimization is based on the beam propagation method (BPM) and implemented using standard CMOS technologies. Experimental results show that the switch meets the requirements for insertion loss and crosstalk at 1550 nm wavelength, and also performs well in a wide wavelength range.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yuqi Wang, Zilong Zhang, Suyi Zhao, Wei He, Xiaotian Li, Xin Wang, Yuchen Jie, Changming Zhao
Summary: This paper investigates the impact of localized defects in SLM devices on structured light generation and demonstrates the reconstructed light field results under different defect states using CGH loaded onto the DMD. The results show that central defects have minimal influence on the reconstructed light field, while edge defects have a significant impact. This study expands the application scenarios for the generation of structured light beams with SLM.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ashraf A. A. Beshr, Hossam El-Din Fawzy, Ehab A. A. Eldin, Jong Wan Hu, Fathi A. Abdelmgeed
Summary: This paper introduces the application of digital measuring techniques, specifically Digital Close Range Photogrammetry (DCRP), in the detection of deformation in post-tensioned structural elements (PTSEs). The use of digital equipment and a terrestrial laser scanner (TLS) allows for highly accurate monitoring of PTSE camber, with deviations not exceeding 0.01 mm.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Shihao Gou, Danping Huang, Shipeng Liao, Fan Luo, Yang Yuan, Liang Liu, Xiaomei Wen
Summary: This paper proposes an online intelligent detection method for cable pitch defects in the field of optical cable manufacturing. The method utilizes a multi-sensor fusion image acquisition platform and deep learning technology to achieve accurate detection of pitch defects in optical cables.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Tun-Yao Hung, David W. U. Chan, Ching-Wei Peng, Chi-Wai Chow, Hon Ki Tsang
Summary: We present the first experimental demonstration of a high-capacity short-reach optical communication link which utilizes LSTM and DNN to achieve 300 Gbit/s 8-level pulse amplitude modulation (PAM8) generated by a single microring modulator. The experimental results show that 300 Gbit/s and 270 Gbit/s PAM8 modulation can be achieved at back-to-back and after 1 km transmission respectively.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Long Zhang, Li Pei, Jianshuai Wang, Jingjing Zheng, Kaihua Hu, Zhiqi Li, Tigang Ning, Jing Li, Li Zhong, Ruisi He
Summary: The amplification of long-haul mode division multiplexing (MDM) transmission systems is currently achieved through three steps, which can result in complexity and degraded transmission performance. To address this issue, this paper proposes an in-line few-mode erbium-doped fiber amplifier (FM-EDFA) based on cladding pumping, which enables simultaneous amplification and transmission in MDM systems. Experimental results demonstrate that the in-line FM-EDFA has excellent performance and shows great potential for practical long-haul transmission systems.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Chong Wang, Miaomiao Li, Jiahao Yang, Bingli Zhu, Jianghao Han, Wenbin Dang
Summary: This paper introduces the design of drive circuits using step recovery diodes and RF bipolar transistors to produce narrow pulse lasers, achieving the reduction of system size, power consumption and cost.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ziqian Zhang, Liangyu Zhao, Chaorun Si, Yang Tian, Shilin Xu
Summary: A Hastelloy C276 coating was prepared on a martensitic stainless-steel substrate using laser melting deposition, resulting in a coating with high resistance to cavitation erosion. The coating exhibited a thick, progressively changing grain morphology from bottom to top, and the grains grew in a specific angle to the substrate plane. A compositional mixing zone was formed at the interface, forming a stable metallurgical bond. The coating showed a significantly improved hardness and enhanced resistance to cavitation erosion compared to the substrate.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Cui-Hong Li, Chao-Xiong He, Yuan-Yuan Ma, Jin-Chuan Wang, Ying Dong, Shao-Chong Zhu, Xiao-Wen Gao, Hui-Zhu Hu
Summary: In this paper, a non-contact optical measuring method for characterizing nanoparticles using optical tweezers is presented. The method relies on the optical polarization and scattering of nanoparticles, providing insights into both shape and size parameters. Experimental results show that the method can accurately measure the shape and size of nanoparticles, making it an effective tool for identifying and studying individual nanoparticles.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Magdalena Zieba, Cuma Tyszkiewicz, Katarzyna Wojtasik, Krystian Pavlov, Pawel Chaber, Ewa Gondek, Jacek Niziol, Roman Rogozinski, Pawel Kielan, Pawel Karasinski
Summary: This work presents a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite layers with refractive indices of approximately 1.65 were fabricated using a sol-gel method and dip-coating technique. The fabricated layers exhibited good waveguide properties and optical homogeneity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yali He, Jiao Tang, Zhongyang Li, Yaowu Hu
Summary: In this paper, a lithography-free broadband absorbing metasurface consisting of Ag nanoparticles with ultrafine nanogaps is demonstrated. The experimental results and numerical simulations show that the horizontally compressed Ag nanoparticles possess smaller nanogaps for high sensitivity, uniformity, and stability. The novel substrate also exhibits insensitivity to the incident or observation angle in an ambient environment and has promising practical applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Linqing Li, Chengwei Yang, Zhuo Wang, Kun Xiao, Rui Min
Summary: In this study, a stretchable polymer optical fiber with a sandwich structure was proposed for sleep monitoring. The fiber improved the pressure sensitivity of the mattress and enabled the measurement of respiratory rate, heart rate, and body motion information.
OPTICS AND LASER TECHNOLOGY
(2024)